I would like to get this skimmer for my 20 long but my tank is underneath a soffit. I have 6.5" from the top frame of my tank to the ceiling. I was hoping someone could measure their skimmer height from the top frame of their tank to the top of the collection cup. I also need a measurement for when the cup is pulled up high enough to be removed. I think I have enough room to fit the skimmer, but I am not sure I will actually be able to remove the collection cup. Hopefully someone out there has this unit and can help me out, I will be very grateful